I am seeing this repeatedly.  May be happening between updates.  As in, I haven't worked on this file for a couple of weeks, installed the latest update, and now this is happening AGAIN.  As in, I have seen this repeatedly in X8.  I have also seen it when importing CAD from other sources as well.   But, the attached screen shots are (1) some text I placed a couple of weeks ago, and now come back to it and all over the place I have to re-size the text box to get the missing letter, or letters,